Oscillations and Waves (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 165  169 of 195
Visit this page to view all the question topics
To view these problems with solutions proceed here and click "Subscribe Now".
Question number: 165
» Oscillations and Waves » Doppler Effect in Sound
Question
A whistle sends out 256 waves in a second. If the whistle approaches the observer with velocity 1/3 of the velocity of sound in air, the number of waves per second the observer will receive,
Choices
Choice (4)  Response  

a.  384 

b.  300 

c.  200 

d.  192 

To view these problems with solutions proceed here and click "Subscribe Now".
Question number: 166
» Oscillations and Waves » Doppler Effect in Sound
Question
A whistle sends out 210 waves in a second. If the whistle approaches the observer with velocity 1/4 of the velocity of sound in air, the number of waves per second the observer will receive
Choices
Choice (4)  Response  

a.  384 

b.  320 

c.  182 

d.  280 

To view these problems with solutions proceed here and click "Subscribe Now".
Question number: 167
» Oscillations and Waves » Doppler Effect in Sound
Question
A source of sound of frequency n is moving towards a stationary observer with a speed S. If the speed of sound in air is V and the frequency heard by the observer is n _{1}, the value of is,
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


To view these problems with solutions proceed here and click "Subscribe Now".
Question number: 168
» Oscillations and Waves » Doppler Effect in Sound
Question
A source of sound emitting a note of frequency 200 Hz moves towards an observer with a velocity v equal to the velocity of sound. If the observer also moves away from the source with the same velocity v, the apparent frequency heard by the observer is,
Choices
Choice (4)  Response  

a.  200 Hz 

b.  100 Hz 

c.  150 Hz 

d.  50 Hz 

To view these problems with solutions proceed here and click "Subscribe Now".
Question number: 169
» Oscillations and Waves » Standing Waves in Strings and Organ Pipes
Question
The frequency of fundamental tone in an open organ pipe of length 0.48 m is 320 Hz. Speed of sound is 320 m/sec. Frequency of fundamental tone in closed organ pipe will
Choices
Choice (4)  Response  

a.  143.2 Hz 

b.  320.0 Hz 

c.  153.8 Hz 

d.  160.0 Hz 

To view these problems with solutions proceed here and click "Subscribe Now".